Add test

.travis.yml

@@ -41,13 +41,5 @@ script:
     elif [ "$LINT" = "vint-errors" ]; then
       vint --error .
     elif [ "$LINT" = "vader" ]; then
-      vim -Nu <(cat <<-EOF
-      filetype off |
-      set rtp+=vader.vim |
-      set rtp+=. |
-      set rtp+=after |
-      filetype plugin indent on |
-      syntax enable |
-      EOF
-      ) -c 'Vader! test/*' > /dev/null
+      vim -Nu test/test.vim -c 'Vader! test/*'
     fi

test/test.vader

@@ -0,0 +1,21 @@
+Execute (Clear search history):
+  for _ in range(&history)
+    call histdel('/', -1)
+  endfor
+
+Given (Search and destroy):
+  I'm a street walking cheetah with a heart full of napalm
+  I'm a runaway son of the nuclear A-bomb
+  I'm a world's forgotten boy
+  The one who searches and destroys
+
+Do (Searches):
+  /street\<CR>
+  /walking\<CR>
+  /cheetah\<CR>
+  /runaway\<CR>
+  /search\<CR>
+
+Execute (Assertions):
+  Log string(map(range(1, &history), 'histget("/", - v:val)'))
+  AssertEqual 'search', histget('/', -1)

test/test.vim

@@ -0,0 +1,6 @@
+filetype off
+set rtp+=/tmp/vader
+set rtp+=.
+set rtp+=after
+filetype plugin indent on
+syntax enable